System Command and snmp commands

["Mulley, Nikhil" <mnikhil@xxxxxxxxxxxxx>]

Hi All,
 
I want to use system command to perform snmp queries on a remote machine and the problem is that I want to store the output /result in an Array , so that I can later use it for parsing purposes.I know I could use exec and passthru statements actually,But I am unable to store the result in the array or I am unsure whether the result is not getting stored in the array 
 
 
Here is the code 
 
 
<?php
exec(' snmpget -v 2c -c public 10.103.16.14  sysUpTime.0',$ret);
list($a)=split('[,]',$ret);
echo $a[0];
 
?>  
 
Point me , if any thing wrong in the code
 
Please help me.
 
 
Thanks,
Nikhil.